Unless you're a personal trainer or an exercise scientist, there's a good chance you've fallen victim to a few health and fitness myths that can stand in the way of your goals. Fortunately, we can look to professionals like Harley Pasternak, the celebrity trainer behind the bodies of Kim Kardashian, Rihanna, and Lady Gaga, to set the record straight. He recently spoke to The Zoe Report about the common mistakes that typically thwart a person's efforts at the gym (unbeknownst to them), and we were both surprised and intrigued. In Pasternak's own words, read what comes to his mind when he thinks of fitness mistakes:

Sticking to a Routine

"People plateau because they don't change their intensity over time or progress in their resistance or volume—they don't have enough variety. All my clients have constant variety in their workouts, from working with body weight versus training equipment to the number of sets and reps and amount of resistance and cadence. Even changing the time, location and the music you work out with can change your entire experience and get you over the dreaded plateau."

Measuring Workouts by Sweat

"People believe you need to sweat to burn fat, but those people who exercise in a hot room to sweat their butt off would be sweating in that same hot room even if they were sitting on a couch. Sweating is the body's response to adjusting to a warm external climate. A person going for a jog outside in the dead of the winter and not sweating much is burning far more calories and fat than their counterparts in the hot environment."

Exercising Just to Feel Sore

"You might believe you need to be sore the day after a workout to prove it was good. While some people enjoy delayed-onset muscle soreness, it's not the only indicator of a successful workout. The pain you feel is a byproduct of factors like volume, intensity and exercise history. If you've never done weight training before, a leg workout might make you sore for a week, while someone used to doing a specific type of exercise might do 10 sets of squats and not be very sore at all."

Head over to The Zoe Report for more from Pasternak, and share your own workout mistakes below.